The power steering return hose may leak at the radiator cooler fitting. If the clamp is not properly tightened, the hose can blow off, causing increased steering effort and a mess under the hood.
Car Problem Reports
Mercedes-Benz ML320 Power Steering Return Hose May Leak at Radiator Cooler Fitting
Mercedes-Benz ML320 Problem
Average Mileage: 107,600 mi (45,000 mi - 170,000 mi)
power steering leak.
i found a recall on power steering leak,
recall # 08v465000
power steering hose connection recall MB
Visitor, 2001 Mercedes-Benz ML320, 92,000 mi
always have to put power steering flued
Visitor, 2001 Mercedes-Benz ML320, 133,000 mi
exact same issue with power steering return hose
it happened twice, first when it was around 45000 miles, second time it happened when it was 62000 miles
Visitor, 2001 Mercedes-Benz ML320, 98,000 mi
Transmission cooler line leaking at radiator causing fluid to be sucked into air box.